Combined type-writing and computing machine.



F. F. MAlN.

COMBINED TYPE WRITING AND COMPUTING MACHINE.

APPLlCATlON FILED SEPT. 15, 191 l.

Patented Feb. 20,1917.

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F. F. MAIN.

COMBINED TYPE WRITING AND COMPUTING MACHINE.

APPLICATION FILED SEPT. I5, 19! 1- 1,216,712,. Patented Feb. 20, 1917.

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F. F. MAIN.

COMBINED TYPE WRITING AND COMPUTING MACHINE. APPLICATION FILED SEPT. 15.1911.

1,216,71 2. Patented Feb. 20, 1917.

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F. F. MAlN.

COMBINED TYPE WRITING AND COMPUTING MACHINE. APPLlCATlON FILED SEPT. 15,191 I.

1,216,71 2. Patented Feb. 20,1917.

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W? e 1W UNITED STATES PATENT OFFICE.

FRED 13. MAIN, OF CHICAGO, ILLINOIS, ASSIGNOR, BY IIIESNE ASSIGNMENTS,T0 UNDER- VVOOD COMPUTING ltIACHINE COMPANY, OF NEVV' YORK, N. Y., A.CORPORATION OF NEW YORK.

COMBINED TYPE-WRITING AND COMPUTING MACHINE.

Application filed September 15, 1911.

To all whom it may concern:

Be it known that 1, Farm 1*. MAIN, a citizen of the United States,residing in Chicago, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Combined TypelVritingand Computing Machines, of which the following is a specification.

This invention relates to a typewriting attachment for a computingmachine, and is an improvement on my Patent No. 1,110, l-tS, grantedSeptember 15, 191%.

The machine to which this invention is applied is of atype adapted. todo rapid computing work, and so constructed as to type write explanatorynotes, names, or dates on the same sheet on which the numbers computedare printed by the printing mechanism of the computing machine ormechanism. There is provided a platen or worksheet-bearing member, whichis common to the typewriting attachment and the comput ing machine, sothat it will serve both. This platen is also so arranged that it can beswung from cooperation with the printing mechanism of the typewritingattachment, to cooperation with the printing mechanism 01" the computingmachine, and vice. versa, the print-ing range of the computing machinebeing inclusive of the printing point of the typewriting attachment.

Tabulating mechanism is provided for the platen and the carriagetherefor, so that the worksheet can be quickly jumped or spaced from onecomputing zone to another, or from one major column on the work-sheet toanother. There is also provided stcp-b v step escapement mechanism forthe carriage bearing the platen, so that in addition to the majormovements thereof, minor letter-space or digit-column movements may behad, which will not only permit the feed for the striking of thedifferent characters of the typewriting attachment, but also permit aminute adjustment of the platen and the work-sheet carried thereby forthe printing mechanism of the computing machine.

The shifting mechanism for adjusting the platen with respect to the twoprinting mechanisms, in this case operates from in back and from below,so as not to intcrtere in any way with the platen in its travel or theworksheet thereon. The shi'tting mechanism to! the platen is controlledfrom the operator or handle of the computing machine, and allowsSpecification of Letters Patent.

Patented Feb. 20, 1917.

Serial No. 649,501.

for the travel of the carriage and the platen relative to the fixedportions of the computing machine.

Other features and advantages will hereinatter appear. 7

In the accompanying drawings,

.liigure 1 is a side view in elevation, with parts broken away to showthe underlying structure.

Fig. 2 is a front view in elevation, with parts removed to simplify theshowing and to uncover the concealed elements.

Fig. 3 is a rear view in elevation, with parts removed to discloseunderlying elements.

Fig. 4tis a fragmentary perspective view oi the carriage escapementmechanism.

Fig. 5 is a fragmentary transverse section a part of the carriageescapement mechanism.

Referring more particularly to the separate parts of this invention asembodied in the drawings, 1 indicates an adding machine which may be ofany suitable character, and in this instance is shown in the form or aBurroughs adder, operated to set up the figures, to be calculated, bykeys 2, and which are printed when desired by printing mechanismindicated at 8, through the actuation of an operating lever 4.

The adding machine 1 divides the typewriting mechanism into actuatingmeans 5 and actuated means 6, the former of which is located in t'rontof the adding machine, and the latter of which is located to the rear ofthe adding machine.

The adding machine and the typcwriting machine have a connnon element,which in this instance is shown as a platen T, with which the printingmechanisms of the adding machine and the typewriting machine cancooperate at the will of the operator.

The actuating means 5 embodies a plurality of character keys 8, whichare adapted to operate through the intermediary of suitably mounted bellcrank lovers 9, a plurality of type bars 10. in such a manner that theywill strike on the upper surface of the platen T. The platen 7 ismounted on a frame .11, which is pivotally mounted at 12, so that it canswing from cooperative juxtaposition with the type bars 10, tocooperative juxta position with the printing mechanism when the handle tis operated, through the l!ltt'!1ll(f(ll1ll'y ot a link 3, a bail arm itand a link 15. The two positions of the platen will be seen in full anddotted lines in Fig. 1.

When any one of the keys 8 is actuated, it is returned to its normalposition by means of a spring 16, but before returning to its normalposition, it will have operated a universal member 17, which shown inthe form of a U-shaped bar pivoted at 18. This universal bar may beprovided with stops 19, so that all of the character keys can cooperatetherewith.

The universal bar 17 may be returned to its normal position by means ofa spring 20. The typewriting mechanism is provided, as is usual in mosttypewriters, with a ribbon 2.1. which the type on the type bars 10strike, so as to obtain the necessary im n'inting on the paper.

It is desirable that this ribbon should be fed from time to time, so asto present a fresh surface to the type bars at each stroke. For thispurpose there are provided reels 22 and 23, which support the oppositeends of the ribbon 21, and which are mounted on shafts One or both ofthese shafts may be driven from the universal bar 17 (Fig. by havingprovided thereon a ratchet wheel 25, which is engaged by aspring-pressed pawl 26 on a lever 21', which is connected to theuniversal bar 17 by means of a link 28. The ratchet wheel 25 may be heldin any adjusted position by means of a detent 29.

It is also desirable that the ribbon 21 should be shifted from aposition away from the work sheet, to a position between the work sheeton the platen 7 and the type on the type bars 10 at each stroke of thecharacter key. For this purpose there is provided a link 30 (Fig. 2)connected to the universal bar 1.7, so as to be operated thereby at eachstroke of a character key, which in turn is connected to one arm of abell crank lever 31, so as to manipulate the same.

The opposite end of this bell. cank lever extends to the rear of theadding machine, where it is adjustably connected, by means of one ormore nuts 32, to a spindle link 33, which is rotatably mounted on onearm of a bell crank lever This bell crank lever 34 is provided with arms35, which together with pivotally mounted arms 36, form a support for ashift 38, which carries the ribbon 21 in such a manner, that the ribboncan slip through it and yet will be manipulated by the shift, so as tomove from a position exjacent the type on the type bars 10 and the sheeton the platen 7, to a position interjacent these elements.

The platen frame 11 is pivotally mounted on a carriage 39, as at 12.This carriage in turn is slidingly mounted on suitable supportingmembers, as by means of rolls 10 and 411, which travel on ways 42 and 13respectively. For the purpose of moving the carriage step-by-step in aletter-feeding direction, there is provided the usual spring drum 11(Fig. connected to the carriage by a flexible connection s15. In orderto prevent the carriage from instantly returning under the influence ofthis spring drum, there is provided an escapement mechanism whichincludes a pinion 416 meshing with a rack-l7 on the carriage 39. Thepinion -16 is rotatably mounted on a shaft 1-8 which swiveled at itsbottom, as at -11) (Fig. .1) so as to swing the pinion -16 into and outof engagement with the rack 17. This pinion it; is normally held inengagement with the rack 17 by means of a spring 50. .lfior a normalstep-by-step movement of the carriage, the pinion 16 is held inengagement with the rack 17 by the spring 50.

Located adjacent the lower end of shaft 18, there is provided anescapement wheel 51, which is held from movement under the influence ofthe spring lelpulling on the carriage 39, by means of a ratchetmechanism This ratchet mechanism includes a lever 53 having a lixeddetent 51 and a pivotally mounted dog The dog 55, when the lever 58 isat its normal position, engages between the teeth of the escapementwheel 51, so as to prevent the rotation of the escapement wheel 51, andthus the movement of the carriage under the tension of the spring 4 1-.This dog 55 is forced into alinement with the fixed detent 5-1, by therotating tendency of the escapement wheel 51, but tends to assume aposition in front of and out of alinement with said detent under theurgency of a spring 56.

When the lever 53 is swung up at its detent and dog-carrying end, thedetent 5-1 will come between the teeth of the escapement wheel, holdingthe same against movement while the dog is lifted from engagement withthe teeth of the escapement whee], permitting it to swing upward betweenthe next two teeth under the pressure of the spring 56, so that when thelever is swung back to its normal position, the dog will pern'iit themovement of the escapement wheel 51 a sullicient distance to bring itonce more into alinement with the detent 51, at which point its movementis limited by a shoulder 57 thereon engaging a corresponding shoulder onthe lever 53.

Movement of the escapement wheel 51 in the opposite direction ispermitted by the dog 55 being formed in two parts, pivotally connectedat 58, the lower portion of which forms a spring-pressed pawl which isadapted to ride over the teeth of the escapement wheel 51, when thelatter is returned after writing a complete line.

In order that this escapement just described may be operated at eachstroke of a character key, the universal member 17 is connected by alink 59 (Fig. 1) to an arm 60 on a shaft 61. The shaft 61 extends to therear of the machine, and Where it is provided with an arm 62 connectedby a link 63 to the lever 53.

It will be seen that the carriage is permitted to travel step-by-stepunder the influence of spring 4L4, at each impression of a character orspace key. Aside from this step-by-step escapement of the carriage, itis desirable that the carriage should have a jump movement, so as toposition the platen at predetermined points, as for example, in making aplurality of columns of names or figures. For this purpose there isprovided on the carriage 39, a bar 64-, on which are mounted a pluralityof adjustable tabulating stops 65 having toes 66 adapted to engage aprojection 67 on a stop 68, secured to any fixed portion of the frame.

In order to bring the t-abulating stops (35 into operation, it is merelynecessary to swing the shaft 48 so as to disconnect the pinion 46 fromengagement with the rack 47, when the carriage will jump until the nextstop (35 comes in engagement with the projection 67. For the purpose ofshifting this shaft 48 in this manner, there is provided a bell cranklever 69 (Figs. 1, J: and which engages the shaft 48, and is operatedthrough the intermediary of a link 70 by an arm 71 secured on a shaft72. The shaft 72 is provided at the front of the machine with an arm 73,connected to a tabulating key 74', mounted in juxtaposition tothecharacter keys 8. 7

It is undesirable, however that these stops should be in such aposition, that they will engage the projection 67, and thus stop thecarriage when the step-by-step escape ment mechanism is in operation. Inorder to avoid this, there is provided a cam lever 75, which is providedwith a cam run 76, the apex of which is adapted to engage a projection'77 on the stops (35, so as to swing the toes 66 of said stops upward tosuch a position, that they will pass over the projection 67. This ismade possible by the fact that the rod ()4 is rotatably mounted.

The apex of the cam run 76 occurs at a point corresponding to theprojection 67, so that when any one of the stops 65 is in a position tostop the carriage, it will. be lifted, if the tabulating mechanism isnot in operation. If the tabulating mechanism, however, is in operation,means is provided for lifting the cam lever to such a position, that itwill not disturb the obstructing action of the stops (35. For thispurpose the shaft 72 is provided with an arm 78 connected by a lever 79to a link 80, which is connected at its opposite end to an arm 81 of thecam lever 75.

lt will be seen that when thc tabulating keys 74 are operated to rotatethe shaft 72, the am lever 75 will be lifted out of cooperative relationwith respect to the projection 77 on the stops 65, so that said stopswill be free to engage the projection 67.

The cam lever 75 will return automatically to its operative positiononthe removal of pressure from the tabulating key 74, by the action of aspring 82. One or more stop keys 83 may be provided for operating thestep-by-step escapement, by manipulating the universal bar 17 withoutthe actuation of any of the type bars.

It will be seen that there is provided a new and improved machineembodying type writing mechanism and adding mechanism, the latter ofwhich divides the former into two parts, to-wit, actuating and actuatedelements, and in which there is provided. an element which cooperateswith both the adding mechanism and the typewriting mechanism, so thatthe results of both can be impressed on a single work sheet placed onthis element, which in this case is shown in the form of a. platen.

It will be further seen that means is provided for actuating the ribbonboth to shift and feed the same, and for controlling the step by-stepescapement of the carriage concomitantly with the actuation of each andall of the character keys.

It will be further seen that provision is made for the proper jumpmovement of the carriage for tabulating purposes.

Variations may be resorted to within the scope of the invention, andportions of the improvements may be used without others.

Having thus described my invention, I claim:

1. The combination with a computing machine, of a typewriting machine,said machines having a platen common to both, a combined jump andstep-by-step escapement for said platen enabling the proper positioningof said platen to cooperate with both said typewriting machine and saidcompnt ing machine; said platen being movable from a positioncooperating with said typewriting machine to a position cooperating withsaid con'iputing machine, and means for concomitantly actuatii'ig saidcomput ing machine and shifting said platen into cooperation therewith.

2. The combination with a computing ma chine, of a typewriting machine,a platen common in both of said machines, each of said machines having aprinting mechanism cooperating with said common platen in the same Z0116but approaching said platen from different directions, a. step-by-stepmovement mechanism for bringing any portion of said platen in theprinting zone for the typewriting machine, and a. jump movementmechanism for bringing any portion of said platen in the printing zoneof said cmnputing nmchine.

3. The combination with a. con'iputing machine of a typew-ritingmachine, a platen common in both of said machines, each of said machineshaving a printing mechanism cooperating with said common platen in thesame zone but approaching said platen from different directions, astep-by-step movement mechanism for bringing any portion of said platenin the printing zone for the typewriting machine, a jump movementmechanism for bringing any portion of said platen in the printing Zoneof said computing machine, and means for selectively facing said platento receive an imprint from either said computing machine or saidtypewriting machine.

4. The combination with a typewriting machine,of a computing machine,said typewriting machine and said computing machine having a commonplaten, a general operator for said computing machine, a link connectedto be operated by said general operator at the operation of saidcomputing machine, a bail operated by said link, said platen having atraveling movement relative to said computing machine and saidtypewriting machine, and a link connected to said platen and said bailso as to shift said platen between engagement with said typewritingmachine and said computing ma chine, said last-mentioned link having asliding connection with said bail so as to be capable of shifting saidplaten for any position thereof.

5. The combination with an adding ma chine, of typewriting mechanismlocated to the rear of said adding machine, a platen cooperating withboth said typewriting mechanism and said adding machine, keys foractuating said typewriting mechanism located in front of said addingmachine, a stepped plate universal to all of said keys to be actuatedthereby, said stepped plate underlying said keys at the front of saidadding machine, an escapement for said platen arranged to move saidplaten step by step, and extraneous connections between said universalplate and. said escapement extending from the front of said addingmachine to the rear thereof enabling the operation of said escapement byany of said keys.

6. The combination with an adding machine, of typewriting mechanismlocated to the rear of said adding machine, a platen in the rear of saidadding machine cooperating with both said typewriting mechanism andsaid'adding machine, a series of keys located in front of said addingmachine for actuating said typewriting mechanism, a stepped plateunderlying and universal to all of said keys arranged to be actuatedthereby, a ribbon for said platen, shifting mechanism for said ribbon,connections between said shifting mechanism and said universal plateextending from front to rear of said adding machine enabling. theshifting of said ribbon at the actuation of any of said keys, anescapement mechanism for said platen located to the rear of said addingmachine, and connections extending from front to rear of said addingmachine enabling the actuation of said escapement by said universalplate.

7. The combination with an adding, machine, of typewriting mechanismlocated to the rear of said adding machine, a platen 1 in the rear ofsaid adding machine cooperating with both said typewriting mechanism andsaid adding machine, a series of keys located in front of said addingmachine for actuating said typewriting mechanism, a stepped plateunderlying and universal to all of said keys arranged to be actuatedthereby, a ribbon for said platen, shifting mechanism for said ribbon,connections be tween said shifting mechanism and said universal plateextending from front to rear of said adding machine enabling the shifting of said ribbon at the actuation of any of said keys, an escapementmechanism for said platen located to the rear of said adding machine,connections extending from front to rear of said adding machine enablingthe actuation of said escapement by said universal plate, driving meansfor advancing said ribbon step by step, and connections to saiduniversal plate for operating said driving means.

8. The combination with a computing device having printing mechanism, ofa typewriting attachment for said computing device having its ownprinting mechanism, a platen common to both said computing device andsaid typewriting attachment so as to be subservient to either of theprinting mechanisms thereof, a general operator, and shifting means forsaid platen connected with the general operator to shift said platenbetween positions of cooperation with said printing mechanisms, theconnection between the general operator and the platen extending partlyaround the path of move ment of the platen and paper carried thereon, topermit the paper to pass said connection,du1.'ing the travel of theplaten.

9. The combination with a computing mechanism, a typewriting mechanismand a traveling platen common to both and shiftable between positionscooperating with each. of a shifting bail having a reach parallel to thetravel of said platen and of an extent at least as great as the travelof said platen, and a link connecting said platen to said reach so as toenable said bail to shift said platen, said link having a slidingconnection with said reach of said bail so as to admit of the travelingmovement of said platen relative to said bail.

10. The combination with a computing mechanism, of a typewritingmechanism, said mechanisms-having a platen common to both, a carriagefor said platen, a step-bystep escapelnent for said carriage enablingthe use of said platen with the typewriting mechanism, a jump escapementfor said carriage enabling the use of said platen with said computingmechanism, and including a plurality of spaced stops, a fixed projectionlying in the path of movement of said stops, means for successivelypreventing the engagemont of said stops and said projection during thestep-by-step movement of said carriage, and means for rendering saidlastmentioned means ineffective during the jump movement of saidcarriage.

4 FRED F. MAIN. Vitnesses A. M. MAIN, RUTH MAIN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, I). G.

DISCLAIMER.

L,2l6,712.-Fred F. jllae'n, Chicago, Ill. COMBINED TYPEWR1TING ANDCOMPUTING MACHINE. Patent dated February 20, 1917. Disclaimer file-dOctober 6, 1925, by the assignee, Underwood Computing Machine Company.

Hereby enters its disclaimer to claims numbered 1, 2, 3, and 10 theright to said claims having been established by lVilliam S. Gubelmann ininterference pr0ceeding No, 43,563.

[Oficial Gaeette November 3, 1925.]

